The 49ers have so many players who need to step up this year. Most of all, Christian McCaffrey needs to be special.

Despite battling injuries last season, Christian McCaffrey is still considered one of the NFL's top running backs, making him an authority when evaluating talent at the position.

One of the biggest was only having star running back Christian McCaffrey for four games. At the beginning of the year, McCaffrey was dealing with Achilles issues. He then suffered a knee injury after making his return to the field.